Highest flowing CFM electric fan that ACTUALLY fits?

Sorry, this isn't what you asked.... But a new 5 blade clutch fan (like the vicious mopar fan) and a shroud will provide the most reliable cooling offered. It's why for many years when all the little front runners with sowing machine motors had electric fans, the trucks and full size vans had a clutch fan and shroud.

• Also, when people burden the old wiring with electric fans, electric fuel pumps, and other power drawing sources in which the factory never intended the harness to support, then add a bigger amp alternator.. we get dash fires and bulkhead fires, etc. Just my 2 cents.